Chunk #1 — Results — The D1/D2 MSNs contain dynorphin but not enkephalin

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Striatal Neurons Expressing D and D Receptors are Morphologically Distinct and Differently Affected by Dopamine Denervation in Mice.

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Examination of ENK and DYN-immunostained sections from colchicine-treated mice reveals that, as expected, D1 MSNs are immunoreactive for DYN but not for ENK. In contrast, D2 MSNs contain ENK but are devoid of DYN. In regard to D1/D2 MSNs, they are immunopositive for DYN but immunonegative for ENK (Fig. 2).